When using natural ventilation methods, what is a common challenge?

Natural ventilation relies on the natural movement of air to circulate through a building, which is influenced by various environmental factors like wind and temperature. A common challenge is the unpredictable airflow rates. This variability can result in insufficient ventilation when airflow is weak, leading to the buildup of indoor pollutants and inadequate removal of stale air. Conversely, when airflow is too strong, it can create discomfort for occupants and may lead to energy loss.

In contrast, consistent air filtration and excessive operational costs are not typically associated with natural ventilation, as this method often does not use mechanical filtration systems and has lower operational costs compared to mechanical ventilation methods. Limited fresh air supply can occur with any ventilation approach but is particularly pertinent to spaces designed in a way that does not facilitate adequate airflow, rather than being a general issue with natural ventilation methods themselves. Thus, unpredictability in airflow rates is a significant factor to consider when employing natural ventilation strategies.